定价： 819元 / 折扣价： 697 元

定价： 975元 / 折扣价： 829 元 加购物车

It includes GI #2. 1. Scope 1.1 This Standard applies to enclosed equipment that is to be permanently field connected to line or load circuits rated 750 V or less. 1.2 Minimum wiring space and wire bending space requirements are specified for f

定价： 455元 / 折扣价： 387 元

Scope Details test criteria for gas convenience outlets and optional enclosures capable of operation at ambient temperatures between 32°F and 200°F (0°C and 93.3°C) if intended for Indoor Use Only, or between -20°F and 200°F (-28.8°C and 93.3°C) if int

定价： 3686元 / 折扣价： 3134 元

Scope Details test and examination criteria for gas convenience outlets and optional enclosures, capable of operation at ambient temperatures between 32°F and 200°F (0oC and 93.3oC) if intended for Indoor Use Only, or between -20°F and 200°F (-28.8oC a

定价： 683元 / 折扣价： 581 元

定价： 683元 / 折扣价： 581 元

5.1 This guide can be used to produce a specification for the acoustical performance of an enclosure.5.2 This guide is intended for those familiar with basic concepts of acoustics.5.3 Although this guide provides detailed guidance in matters relating to specification of acoustical enclosures, it is not a substitute for the experience and judgment of an acoustical or noise control professional.5.3.1 This guide calls for measurements common within acoustical practice.5.3.2 The more critical the performance requirements of the enclosure, the more the user should consider seeking the services of an acoustics or noise control professional.5.4 The specifying of a sound-isolating enclosure has three sequential steps:5.4.1 Determine the sound pressure levels that exist at specific locations prior to the introduction of the enclosure,NOTE 1: In the case of new construction, the sound pressure level is often estimated from the sound power levels of noise-emitting equipment and a general description of the acoustical properties of the environment.5.4.2 Determine the maximum permissible sound pressure levels that must exist at the same locations after the introduction of the enclosure, and5.4.3 Determine the required enclosure level reduction. The required isolation is related to the difference between the sound pressure levels before and after the introduction of the enclosure.5.5 Many specifications are for multiple enclosures or enclosures with multiple functions, or both. It is beyond the scope of this guide to provide detailed guidance for every possible combination. Separate specifications for each source-enclosure-receiver combination should be used in such a case.5.6 The type of specification that should be selected depends both on the purpose of the enclosure and how crucial its performance is. In general:5.6.1 If exceeding a particular maximum permissible sound pressure level spectrum would render the enclosure unsuccessful, a sound pressure level specification should be used.5.6.1.1 This guide assigns all phases of acoustical design are delegated to the supplier. Compliance is usually more easily verified than with the level reduction method.5.6.2 If the criteria for the success of the enclosure are less stringent or not related to a specific maximum permissible spectrum, a level reduction specification may be used.1.1 The guide covers the development of criteria for the acoustical performance of a broad variety of acoustical enclosures by identifying information necessary to unambiguously describe acoustical performance. This guide is not a standard ASTM specification for a sound-isolating enclosure.1.2 Excluded from the scope of this guide are technical considerations for enclosure design that do not pertain directly to acoustical performance.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

Scope Details test and examination criteria for ventless firebox enclosures for unvented decorative room heaters. Fireboxes covered by this standard are intended for use with unvented decorative room heaters which comply with ANSI Z21.11.2 for installat

定价： 3777元 / 折扣价： 3211 元

Scope Details test and examination criteria for ventless firebox enclosures for unvented decorative room heaters. Fireboxes covered by this standard are intended for use with unvented decorative room heaters which comply with ANSI Z21.11.2 for installat

定价： 774元 / 折扣价： 658 元

Scope Details test and examination criteria for ventless firebox enclosures for unvented decorative room heaters. Fireboxes covered by this standard are intended for use with unvented decorative room heaters which comply with ANSI Z21.11.2 for install

定价： 728元 / 折扣价： 619 元

3.1 This guide is intended for use by material suppliers, aircraft transparent enclosure fabricators, airframe manufacturers, government agencies, and others that may become involved in the testing of transparent interlayer materials. These test methods provide data on both individual interlayer materials and material combinations commonly used in the fabrication of aerospace transparent enclosures and provide a means of evaluating the performance of one interlayer material against another.3.2 Primary characteristics and their long-term stability are critical to the performance of an interlayer material. Basic tests define the as-manufactured material characteristics of the interlayer material. Aging procedures provide for representative exposure to environments that induce changes in material characteristics. Tests performed before and after ageing exposure provide a means of estimating the potential useable life-span of an interlayer material or to compare the durability of one interlayer material with another.3.3 When employing these test methods for the comparison of interlayer materials after exposure to selected environmental conditions, the user shall be aware that many factors influencing degradation due to weathering vary from one location and exposure period to another location and exposure period. For direct weathering comparisons, the interlayer materials to be compared shall be subjected to the exposure and have the tests performed at the same time. It is emphasized that the test values obtained under these simultaneously applied conditions are for comparative use and their use as design characteristics shall be made with caution.3.4 The test methods listed include those considered critical to the performance of aircraft transparent enclosures. The user is advised to use the latest revision of any test method.1.1 This guide summarizes the standard test methods available for determining physical and mechanical characteristics of interlayer materials used in multi-ply aerospace transparent enclosures.1.2 Interlayer materials are used to laminate glass-to-glass, glass-to-plastic, and plastic-to-plastic. Interlayer materials are basically transparent adhesives with high-quality optical properties. They can also serve as an energy absorbing medium, a fail-safe membrane to contain cockpit pressure and to prevent entry of impact debris; a strain insulator to accommodate different thermal expansion rates of members being laminated and as an adherent to prevent spalling of inner surface ply material fragments. The relative importance of an interlayer characteristic will be a function of the prime use it serves in its particular application.1.3 This guide, as a summary of various methods in Section 2, is intended to facilitate the selection of tests that can be applied to interlayer materials.1.4 The test methods listed are for use in determining basic design characteristics and in assuring lot-to-lot uniformity of the materials being tested except as noted in 3.3.1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This safety specification covers the performance and safety requirements intended to reduce the potential hazards associated with the manufacture and assembly of components, maintenance, use, and labeling of consumer trampoline enclosures. This specification is applicable to trampoline enclosures to be sold as an accessory to or packaged with trampolines of a minimum bed size of 3300 in.2 (2.1 m2); a minimum height of 20 in. (510 mm); intended for the purpose of continuous, vertical jumping activities; and intended for consumer use.1.1 This safety specification covers the components, assembly, use, labeling, and performance requirements of consumer trampoline enclosures (see Safety Specification F381).1.2 This specification is applicable to trampoline enclosures to be sold as an accessory to or packaged with trampolines of (1) a minimum bed size of 3300 in.2 (2.1 m2), (2) a minimum height of 20 in. (510 mm), (3) intended for the purpose of continuous, vertical jumping activities, and (4) intended for consumer use.1.3 This specification includes the following sections and selected subsections:  Section 1Referenced Documents 2Terminology 3Components 4General Requirements 5Performance Requirements 6Performance Tests 6Information Packet 7Product Marking 8Packaging and Package Marking 91.4 This specification does not purport to address all of the hazards that may be associated with trampolines or trampoline enclosures, or both. The standard’s existence alone will not necessarily prevent injuries. Like other physical activities, trampoline use involves the risk of injury, particularly if the equipment is used improperly. Similarly, the use of a trampoline enclosure alone will not necessarily prevent all injuries.1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.1.6 The following precautionary caveat pertains only to the test methods portion of this specification. This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

1. Scope 1.1 This Standard applies to special purpose enclosures for electrical equipment intended to be installed and used in non-hazardous locations in accordance with the Rules of the Canadian Electrical Code, Part I, as follows: (a) enclosures for

定价： 455元 / 折扣价： 387 元

1. Scope This Standard applies to cast aluminium alloy enclosures pressurized with dry air, inert gases, eg. sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a mixture of such gases, used in indoor or outdoor installations of high-voltage swi

定价： 728元 / 折扣价： 619 元

2. Scope and Field of Application 2.1 Type of Equipment This Standard applies to fusion welded wrought aluminium and alu minium alloy enclosures pressurized with dry air, inert gases, eg, sulphur hexafluoride, carbon tetrafluoride, or nitrogen or a m

定价： 1274元 / 折扣价： 1083 元